Kennametal 2384512 Carbide Thread Mill Insert 20 Tpi

Product Description

The KENNAMETAL 2384512 is a carbide thread mill insert designed for internal threading operations on UN-standard thread forms at 20 teeth per inch (TPI). Manufactured in the STN insert style with a KC635M carbide grade, this insert features a TiAlN coating applied via PVD process, which provides thermal resistance and extended tool life in demanding cutting conditions. With a 0.25-inch (6.35 mm) inscribed circle, it is sized for use in compact thread milling toolholders. Licensed HVAC, plumbing, and mechanical trade shops as well as production machinists rely on inserts of this type for precise, repeatable internal thread generation in ferrous and non-ferrous materials.

This insert is suited for internal UN thread milling applications in production and job-shop environments. The STN style and 20 TPI specification make it appropriate for threading operations where a dedicated thread mill insert is preferred over single-point or tap-based methods. It is packaged individually but carries a minimum order quantity of 10 units, making it practical for stocking in toolrooms that maintain thread milling programs across multiple machining centers or CNC mills.

Key Features

• STN insert style with KC635M carbide substrate for wear resistance
• TiAlN coating via PVD process for thermal and oxidation resistance
• 20 TPI for UN internal thread forms
• 0.25-inch inscribed circle for compact toolholder compatibility
• Non-conical geometry suited to standard thread milling paths

Compatibility

Designed as a direct-fit replacement insert for STN-style thread mill toolholders accepting a 0.25-inch inscribed circle insert for UN internal threading applications at 20 TPI.

Installation Notes

Thread mill inserts should be installed and secured by a qualified machinist or toolroom technician following the toolholder manufacturer's seating and clamping specifications. Ensure the machine spindle is fully stopped and the CNC program is cleared before changing inserts. Inspect the insert pocket for debris or damage before seating the new insert. Follow your facility's lockout/tagout procedures before performing any tooling changes on machining equipment.